31103220203117 has 2 divisors, whose sum is σ = 31103220203118. Its totient is φ = 31103220203116.

The previous prime is 31103220202993. The next prime is 31103220203177. The reversal of 31103220203117 is 71130202230113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21058085810281 + 10045134392836 = 4588909^2 + 3169406^2 .

It is a cyclic number.

It is not a de Polignac number, because 31103220203117 - 2¹⁶ = 31103220137581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31103220203177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15551610101558 + 15551610101559.

It is an arithmetic number, because the mean of its divisors is an integer number (15551610101559).

Almost surely, 2^{31103220203117} is an apocalyptic number.

It is an amenable number.

31103220203117 is a deficient number, since it is larger than the sum of its proper divisors (1).

31103220203117 is an equidigital number, since it uses as much as digits as its factorization.

31103220203117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512, while the sum is 26.

The spelling of 31103220203117 in words is "thirty-one trillion, one hundred three billion, two hundred twenty million, two hundred three thousand, one hundred seventeen".